Science : Ch 11 – The Human Eye and the Colourful World

The absorption of light by a molecule depends on the

In an experiment to trace the path of a ray of light through a triangular glass prism, a student would observe that the emergent ray

The sun appears red at sunset or sunrise. Choose the incorrect statement from the following

A student traces the path of a ray of light through a triangular glass prism for diferent values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw?

Power of a lens is the measure of the degree of

Power of a lens is

Light which consists of only one colour or single wavelength is called Monochromatic

The sky appears black to an astronaut

The density of the atmosphere, as we know goes on decreasing as the distance above the sea level increases,this phenomeneon is called

The defect in a person can see nearby objects but not far away objects

The defect the eye cannot focus objects both horizontally and vertically at the same time

The SI unit of Power of a lens is

The emergent ray in a prism bend at an angle to the direction of the

The sky appears black to an astronaut as there is no

The refractive index of glass is least for